Fig. 3: Catalytic performance.
From: Ammonia pools in zeolites for direct fabrication of catalytic centers
a The catalytic activity comparison of Cu-MOR catalysts reduced by APE and H2 in DME carbonylation, and the stability test of Py-Cu(3.41 wt%)-MOR(APE). Reaction condition: 0.5 g catalyst, reaction temperature 220 °C, reaction pressure 1.5 MPa, reaction time 8 h, reaction gas DME/CO/Ar = 4.1/92.8/3.1 (vol %), flow rate = 20 mL/min, GHSV (Gas Hour Space Velocity) = 2400 mL (g h)−1. Stability test was accomplished under 4 MPa, reaction gas DME/CO/H2/Ar = 5.0/31.9%/60.0%/3.1 (vol %). b A predictive performance model for DME carbonylation on the H-Cu(X)-MOR(APE) catalysts. It was based on the distribution of copper valences, copper content, and STY of MA. c The catalytic performance of different Ag-based catalysts in synthesis of ethylene by methane coupling. The pie charts represent the product selectivity. The selectivity of the other products included heavy hydrocarbons of benzene, toluene, naphthalene, and coke. The Ag-ZSM5(E-NH3) was reduced by externally introduced NH3 gas. Reaction condition: 0.5 g catalyst, reaction temperature 800 °C, reaction pressure 0.1 MPa, reaction gas CH4/Ar = 90.3%/9.7% (vol %), flow rate = 12.5 mL/min, GHSV (Gas Hour Space Velocity) = 1500 mL (g h)−1. d The catalytic performance of methanol synthesis from methane oxidation over different Pd-zeolite catalysts after reduction of APE or H2. Reaction condition: 10 mg catalyst, 0.5 M H2O2 in 10 mL H2O, reaction temperature 70 °C, reaction pressure 3.0 MPa (CH4), reaction time 30 min. On the Pd-Y samples, the catalyst weight was 30 mg, and the reaction temperature was 50 °C.
